In what could be a huge step forward for space exploration, the Breakthrough Starshot project aims to send a fleet of miniature probes to our neighboring star system, Alpha Centauri, at 100 million miles per hour, or 1/5th the speed of light, in a "search for life in the Universe."

Ground control to major Tom? According to some recently declassified NASA transcripts and recordings - and according to a new episode of Science Channel's series, "NASA's Unexplained Files,"- the three-man crew of Apollo 10, which orbited the moon in 1967, were taken by surprise and weirded-out when they heard some unexplained sounds as they traveled on the far, or ...